When he was alive, the old scientist used to say that knowledge __from practice and he gained his experience by doing a lot of practical work.
A.was coming | B.had come | C.comes | D.would come |
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When he was alive, the old scientist used to say that knowledge __from practice and he gained his experience by doing a lot of practical work.
A.was coming | B.had come | C.comes | D.would come |